The colour represents components of white
light spectrum. There are three primary
colours – blue, yellow and red,
which cannot be obtained by mixing other paints. The other three
colours (green, orange and violet) are the combinations of primary
ones.
Clean music chord contains
6 harmonic intervals. For clarity sake, the intervals should be
given the numerical value representing number of semitones in the
interval.
For example, the C-major chord notes are Do, Mi, Sol and Do (in
alt). The following intervals will be possible in this chord: Do/Mi
(major third) – 4 semitones, Mi/Sol (minor
third) – 3 semitones, Sol/Do of next
octave (perfect fourth) – 5 semitones,
Do/Sol (perfect fifth) – 7 semitones,
Mi/Do (minor sixth) – 8 semitones, Sol/Mi
(major sixth) – 9 semitones.
Thus, three intervals (3, 4, 5) are being
the basic ones, and another three (7, 8, 9) are component ones since
these can be obtained by composing 3, 4 and 5.
Thus, you can see the correspondence
of two super-harmonious structures – white light and the consonant
chord, which consist of equal number of elements. The properties
of light elements coincide with the properties of consonant chord
elements, namely: three basic elements; composition of component
ones out of them (optical for colours, and mathematical for octave
semitones); contrast (for example, red contrasts with the green,
perfect fourth is the conversion from the perfect fifth).
Why the interval of 3 semitones is compared with the
blue colour and not with yellow one, for instance?
How the multitude of colours we see is expressed in music?
